Earth
- Earth
When do EMFs disturb the heart?
Whether electromagnetic fields can blunt the healthy variability in heart rate may depend on an exposed individual being aroused or stressed during exposure.
- Earth
Methylmercury’s toxic toll
More than 60,000 children are born each year with neurodevelopmental impairments due to their prenatal exposure to methylmercury.
- Earth
China: A mercury megapolluter
China's heavy reliance on coal burning makes it a world leader in mercury air pollution.
- Earth
Living routes to toxic routs
Scientists are developing novel techniques for removing perchlorate, a potentially carcinogenic pollutant, from water.
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- Earth
Newfound gas is greenhouse powerhouse
Scientists have detected in the atmosphere for the first time a gas that traps heat more effectively than any other previously found there.
- Earth
More Arctic clouds may lessen warming
Nearly 2 decades of satellite observations suggest that an increase in Arctic cloudiness at certain times of the year may partially counteract the effects of global warming in the region.
- Earth
Fallen Trees? Scotch pines emit nitrogen oxides into the air
Northern pine forests may exude nitrogen oxides—a contributor to smog and acid rain—in quantities that rival those produced by industry and traffic worldwide.
- Earth
Killer Crater: Shuttle-borne radar detects remnant of dino-killing impact
Radar images gathered during a flight of the space shuttle Endeavour 3 years ago show the subtle topography related to the impact of an asteroid or comet that may have wiped out the dinosaurs 65 million years ago.
- Earth
Past and Future Earth
Curious about what Earth’s continents and oceans might look like 50 million years from now? Geologist Christopher R. Scotese of the University of Texas at Arlington has created a Web site devoted to plate tectonics and Earth’s geography and climate, from the deep past to the distant future. The site features maps of Earth, animations, […]
- Earth
Earth Views
The “Global View of the Earth” Web site offers lesson plans and other material for middle school teachers interested in classroom use of images taken by NASA’s Landsat-7 satellite. Students learn about the spacecraft and try to identify “mystery” images–full-color, visible-light images of objects such as airports and bridges, as seen from Landsat more than […]
- Earth
Autosub Under Ice
Follow the Southampton (UK) Oceanography Centre’s “Autosub Under Ice” expedition to Antarctica’s Pine Island Bay. The centre’s Web site features daily news reports, images, and interviews with expedition members aboard the unmanned sub’s parent ship. The expedition runs until April 2. Go to: http://www.soc.soton.ac.uk/SOES/MSC/OC/CEO/aui/live.html
